CN114215481A - Subassembly and geothermol power geological exploration coring device that adjustable is stabilized to subbase - Google Patents
Subassembly and geothermol power geological exploration coring device that adjustable is stabilized to subbase Download PDFInfo
- Publication number
- CN114215481A CN114215481A CN202111517451.9A CN202111517451A CN114215481A CN 114215481 A CN114215481 A CN 114215481A CN 202111517451 A CN202111517451 A CN 202111517451A CN 114215481 A CN114215481 A CN 114215481A
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- Prior art keywords
- fixed
- power connector
- lifting platform
- subbase
- geological exploration
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- 238000005553 drilling Methods 0.000 claims abstract description 27
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 13
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 7
- 239000002689 soil Substances 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- 230000005641 tunneling Effects 0.000 abstract description 2
- 230000003028 elevating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/081—Screw-and-nut feed mechanisms
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a geological exploration apparatus, in particular to a stable and adjustable subbase assembly and a core taking device for geothermal geological exploration, which comprise a subbase structure and an adjusting structure which is movably arranged above the subbase structure and is used for connecting a drilling mechanism, wherein the drilling mechanism is arranged above the center of the adjusting structure, the subbase structure comprises a fixed base which is horizontally arranged and can be fixed with a ground foundation and a lifting platform which can be arranged between the fixed bases in a lifting way, a base plate which is used for connecting the drilling mechanism is fixed on the lifting platform, and the adjusting structure is arranged between the lifting platform and the fixed base; the two groups of double-stroke oil cylinders and the four groups of piston rods enable the fixed base and the lifting platform to be connected through the four supporting arms, so that the stability is improved, and meanwhile, the supporting force is increased; the core taking device for geothermal geological exploration can enable the core taking drill barrel to move downwards and simultaneously rotate, so that the rotary tunneling action can be completed and downward exploration can be followed under the action of the same power source, and the functions of precession and drilling are integrated.
Description
Technical Field
The invention relates to geological exploration equipment, in particular to a component with a stable and adjustable subbase and a coring device for geothermal geological exploration.
Background
The geothermal energy is still silently developed, and only in recent years, the ground source heat pump is suddenly and violently advanced to reach an unprecedented height, so that the development of other fields of the geothermal energy is driven, and the geothermal energy has competitive potential with solar energy and wind energy.
The potential of geothermal energy is not only in shallow geothermal energy, but also in vast stratum depths, and huge geothermal energy is stored, and the huge geothermal energy indicates that the potential is not developed on a large scale at present because of two reasons: first, market limitations and second, technical limitations.
Most of the existing geothermal drilling equipment is not adjustable in height, and the frame body partially adjusted by hydraulics and pneumatics can be adjusted in initial height, but the stability is deteriorated after the height is adjusted.
Disclosure of Invention
The invention aims to provide a stable and adjustable subbase assembly and a coring device for geogeothermal exploration, which aim to solve the problem of difficult adjustment in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a subbase stable adjustable assembly comprises a subbase structure and an adjusting structure movably arranged above the subbase structure and used for connecting a drilling mechanism, wherein the drilling mechanism is arranged above the center of the adjusting structure and used for drilling underground rock soil;
the base structure comprises fixed bases which are horizontally arranged and can be fixed with a ground foundation and a lifting platform which can be arranged between the fixed bases in a lifting way, a base plate used for connecting the drilling mechanism is fixed on the lifting platform, and the adjusting structure is arranged between the lifting platform and the fixed bases;
the adjusting structure is two groups, each group comprises a double-stroke oil cylinder arranged on the fixed base and piston rods movably arranged at two ends of the double-stroke oil cylinder, and the piston rods are connected with the lifting platform through supporting arms.
The invention further defines the scheme as follows: the free end of the piston rod is fixed with the push plate, two sides of the fixed base are respectively provided with a guide rail, and the push plate is in sliding fit with the guide rails.
The coring device for the geothermal geological exploration comprises the subbase stable adjustable component and the drilling mechanism, wherein the drilling mechanism comprises two guide columns fixed on the polar plate and a frame body arranged on the guide columns in a sliding manner;
a thread transmission structure is arranged between the frame body and the base plate, a core drill cylinder for drilling rock soil is also arranged on the frame body, a power structure is detachably arranged on the upper part of the core drill cylinder, and the power structure is connected with the thread transmission structure;
the power structure is connected with the core drill barrel through a clamping structure.
The invention further defines the scheme as follows: the power structure sets up including rotating the power connector at support body center, power connector is the tube-shape, the joint structure sets up power connector is last core drill section of thick bamboo's upper portion inner wall both sides respectively are provided with one be used for with joint structure complex draw-in groove.
The invention also provides a scheme as follows: the clamping structure comprises an adjusting screw rod rotatably arranged in the center of the power connector, a sleeve in threaded connection with the adjusting screw rod, and an upper stabilizing part fixed at the lower end of the power connector, wherein a sleeve block is fixed at the lower part of the upper stabilizing part, clamping blocks are arranged on two sides of the sleeve block in a sliding manner, and the clamping blocks are connected with the sleeve through connecting rods;
the lower part of cover block is fixed with the lower stabilizing member of core drill section of thick bamboo upper portion inner wall laminating, go up stabilizing member edge also with the inner wall laminating on core drill section of thick bamboo upper portion, connecting rod one end with the fixture block is articulated, and the other end with the sleeve is articulated go up stabilizing member and last seted up the confession the logical groove that the connecting rod passed.
The invention also provides a scheme as follows: the thread transmission structure comprises two lead screws vertically fixed on the substrate and a solenoid in threaded connection with the lead screws, and a central connecting line of the two lead screws is spatially vertical to a central connecting line of the two guide pillars;
the screw tube is rotatably arranged on the frame body and is connected with the power connector through a meshing structure, and the screw threads of the two lead screws are in the same rotating direction.
The invention also provides a scheme as follows: the meshing structure comprises a gearwheel fixed on the outer wall of the power connector and a pinion fixed on the outer wall of the solenoid and meshed with the gearwheel;
the top of adjusting screw passes power connector's top and normal running fit with it the top of adjusting screw is fixed with and is used for manual drive adjusting screw pivoted knob, the base plate with the unable adjustment base center all is provided with the confession core drill section of thick bamboo passes the through-hole.
Compared with the prior art, the invention has the beneficial effects that: because two groups of double-stroke oil cylinders and four groups of piston rods are arranged, the fixed base is connected with the lifting platform through four supporting arms, four corners of the lifting platform can be supported, the stability is improved, and the supporting force is increased;
the coring device for geothermal geological exploration has the characteristic of being detachable, and meanwhile, the coring drill barrel can rotate while moving downwards, so that the rotary tunneling action can be completed and downward exploration can be followed under the action of the same power source, and the functions of precession and drilling are integrated.
Drawings
FIG. 1 is a schematic structural view of a coring device for geodetic exploration.
FIG. 2 is a schematic structural view of another view of the coring device for geodetic exploration.
FIG. 3 is a schematic view of a drill mechanism in a coring device for geodetic exploration.
FIG. 4 is a half-sectional view of a coring bit and clamping structure of the coring device for geodetic exploration.
Fig. 5 is a partially enlarged schematic view of a portion a of fig. 4.
FIG. 6 is a schematic structural view of a clamping structure and a power connector in the coring device for geogeothermal exploration.
FIG. 7 is a schematic structural view of a slot and a power connector in a coring device for geodetic exploration.
In the figure: 1-fixing a base; 2-a lifting platform; 3-a support arm; 4-a double-stroke oil cylinder; 5-a piston rod; 6-a substrate; 7-guide pillar; 8-frame body; 9-a power connector; 10-a bull gear; 11-pinion gear; 12-a coil; 13-a lead screw; 14-core drill barrel; 15-adjusting the screw; 16-a knob; 17-a sleeve; 18-a connecting rod; 19-a nest block; 20-fixture block; 21-a lower stabilizer; 22-an upper stabilizer; 23-card slot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, an element of the present invention may be said to be "fixed" or "disposed" to another element, either directly on the other element or with intervening elements present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Referring to fig. 1 to 7, as an embodiment of the present invention, a sub-base stable adjustable assembly includes a sub-base structure and an adjusting structure movably disposed above the sub-base structure for connecting a drilling mechanism, wherein the drilling mechanism is disposed above the center of the adjusting structure for drilling underground rock;
the subbase structure comprises fixed bases 1 which are horizontally arranged and can be fixed with a ground foundation and a lifting platform 2 which can be arranged between the fixed bases 1 in a lifting way, a base plate 6 used for connecting the drilling mechanism is fixed on the lifting platform 2, and the adjusting structure is arranged between the lifting platform 2 and the fixed bases 1;
the adjusting structures are two groups, each group comprises a double-stroke oil cylinder 4 arranged on the fixed base 1 and piston rods 5 movably arranged at two ends of the double-stroke oil cylinder 4, and the piston rods 5 are connected with the lifting platform 2 through supporting arms 3;
specifically, one end of the supporting arm 3 is hinged to the free end of the piston rod 5, and the other end of the supporting arm is rotatably connected to the edge of the lifting platform 2.
In this embodiment, owing to set up two sets of double-stroke hydro-cylinders 4 and four piston rods of group 5 to make and connect through four support arms 3 between unable adjustment base 1 and the elevating platform 2, can support the four corners of elevating platform 2, still increased the support dynamics when having improved stability.
As another embodiment of the present invention, the free end of the piston rod 5 is fixed with a push plate, two sides of the fixed base 1 are respectively provided with a guide rail, and the push plate is in sliding fit with the guide rails.
In this embodiment, the push plate is fixed to the piston rod 5, so that the twisting resistance of the piston rod 5 is reduced, and the horizontal movement stability of the push plate is further improved by the cooperation of the push plate and the guide rail.
In detail, when the lifting platform 2 receives the force in the inclined direction, the push plate on one side has the tendency of tilting upward, the push plate on the other side has the tendency of swinging downward, the push plate with the tendency of swinging downward can be supported by the fixing base 1, and the push plate on one side with the tendency of tilting upward can be supported by the guide rail, so that the piston rod 5 is prevented from being twisted.
A coring device for geothermal geological exploration comprises the subbase stable adjustable component and a drilling mechanism in the embodiment, wherein the drilling mechanism comprises two guide columns 7 fixed on a polar plate 6 and a frame body 8 arranged on the guide columns 7 in a sliding manner;
a thread transmission structure is arranged between the frame body 8 and the base plate 6, a core drill cylinder 14 for drilling rock soil is further arranged on the frame body 8, a power structure is detachably arranged on the upper part of the core drill cylinder 14, and the power structure is connected with the thread transmission structure;
the power structure is connected with the core drill barrel 14 through a clamping structure.
In this embodiment, the core drill barrel 14 is driven to rotate by the power structure, and the power structure drives the screw transmission structure to move, so that the frame body 8, the power structure and the core drill barrel 14 are driven to move downwards, and the core drill barrel 14 rotates while moving downwards, so that underground rock soil is loaded into the core drill barrel 14.
As another embodiment of the present invention, the power structure includes a power connector 9 rotatably disposed at the center of the frame body 8, the power connector 9 is cylindrical, the clamping structure is disposed on the power connector 9, and two clamping grooves 23 for cooperating with the clamping structure are respectively disposed on two sides of the inner wall of the upper portion of the core drill barrel 14.
In this embodiment, the power connector 9 is mounted on the top of the core drill barrel 14 by engaging the engaging structure with the engaging grooves 23 on both sides of the inner wall of the upper portion of the core drill barrel 14, the power connector 9 can be driven to rotate by a power machine, such as an internal combustion engine, an electric motor, etc., and the power connector 9 can be driven to rotate by belt transmission, chain transmission, gear transmission, etc.
As another embodiment of the present invention, the clamping structure includes an adjusting screw 15 rotatably disposed in the center of the power connector 9, a sleeve 17 screwed on the adjusting screw 15, and an upper stabilizing member 22 fixed at the lower end of the power connector 9, a sleeve block 19 is fixed at the lower part of the upper stabilizing member 22, a latch block 20 is slidably disposed at both sides of the sleeve block 19, and the latch block 20 and the sleeve 17 are connected by a connecting rod 18;
the lower part of the sleeve block 19 is fixed with a lower stabilizing part 21 attached to the inner wall of the upper part of the core drill barrel 14, the edge of the upper stabilizing part 22 is also attached to the inner wall of the upper part of the core drill barrel 14, one end of the connecting rod 18 is hinged to the fixture block 20, the other end of the connecting rod is hinged to the sleeve 17, and a through groove for the connecting rod 18 to pass through is formed in the upper stabilizing part 22.
In this embodiment, the coaxial stability between the power connector 9 and the core barrel 14 is improved by the upper and lower stabilizing members 22, 21; the sleeve 17 can be driven to ascend and descend by rotating the adjusting screw 15, so that the connecting rods 18 on the two sides are driven to drive the two fixture blocks 20 to mutually approach or separate, when the two fixture blocks 20 are mutually separated, the two fixture blocks can be embedded into the clamping grooves 23 on the inner wall of the upper part of the core drill barrel 14, and the power connector 9 and the core drill barrel 14 are fixed; when the two clamping blocks 20 are close to each other, the clamping blocks 20 embedded in the clamping grooves 23 on the two sides can be separated from the clamping grooves 23, and the coring bit barrel 14 and the power connector 9 can be detached at the moment.
As another embodiment of the present invention, the thread transmission structure includes two lead screws 13 vertically fixed on the base plate 6 and a solenoid 12 threadedly connected to the lead screws 13, and a center connecting line of the two lead screws 13 is spatially perpendicular to a center connecting line of the two guide pillars 7;
the screw tube 12 is rotatably arranged on the frame body 8 and is connected with the power connector 9 through a meshing structure, and the thread turning directions of the two lead screws 13 are the same.
In this embodiment, when the power connector 9 rotates, the two screw pipes 12 are driven to rotate by the meshing structure, and the two screw pipes 12 drive the frame body 8 to move downwards under the action of the fixed lead screw 13, so that the power connector 9 and the core drill cylinder 14 are driven to move downwards, and the purpose of rotating the core drill cylinder 14 while moving downwards is achieved.
As still another embodiment of the present invention, the engaging structure includes a large gear 10 fixed on an outer wall of the power connector 9 and a small gear 11 fixed on an outer wall of the coil 12 and engaged with the large gear 10;
the upper part of the adjusting screw 15 passes through the top of the power connector 9 and is in running fit with the power connector, a knob 16 for manually driving the adjusting screw 15 to rotate is fixed on the top of the adjusting screw 15, and the centers of the base plate 6 and the fixed base 1 are provided with through holes for the core drill barrel 14 to pass through.
In this embodiment, when the power connector 9 rotates, the gear wheel 10 is driven to rotate, the gear wheel 10 drives the pinions 11 on both sides to rotate in the same direction, and further drives the screw pipes 12 on both sides to rotate in the same direction, and because the screw threads of the lead screws 13 on both sides rotate in the same direction, the screw pipes 12 on both sides can drive the frame body 8 to lift in the same direction.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. The assembly is characterized by comprising a base structure and an adjusting structure movably arranged above the base structure and used for connecting a drilling mechanism, wherein the drilling mechanism is arranged above the center of the adjusting structure and used for drilling underground rock soil;
the subbase structure comprises fixed bases (1) which are horizontally arranged and can be fixed with a ground foundation and a lifting platform (2) which can be arranged between the fixed bases (1) in a lifting way, a base plate (6) used for connecting the drilling mechanism is fixed on the lifting platform (2), and the adjusting structure is arranged between the lifting platform (2) and the fixed bases (1);
the adjusting structure is two groups, each group comprises a double-stroke oil cylinder (4) arranged on the fixed base (1) and piston rods (5) movably arranged at two ends of the double-stroke oil cylinder (4), and the piston rods (5) are connected with the lifting platform (2) through supporting arms (3).
2. A stable adjustable assembly of substrates according to claim 1, characterized in that the free end of the piston rod (5) is fixed to a push plate, and that a guide rail is provided on each side of the fixed base (1), and the push plate is slidably engaged with the guide rail.
3. A coring device for geothermal geological exploration, comprising a subbase stabilizing adjustable assembly and a drilling mechanism according to claim 1, characterized in that said drilling mechanism comprises two guide posts (7) fixed on said polar plate (6) and a frame body (8) slidingly arranged on said guide posts (7);
a thread transmission structure is arranged between the frame body (8) and the base plate (6), a core drill cylinder (14) for drilling rock soil is further arranged on the frame body (8), a power structure is detachably arranged on the upper part of the core drill cylinder (14), and the power structure is connected with the thread transmission structure;
the power structure is connected with the core drill barrel (14) through a clamping structure.
4. The coring device for geothermal geological exploration, as set forth in claim 3, characterized in that the power structure comprises a power connector (9) rotatably disposed at the center of the frame body (8), the power connector (9) is cylindrical, the clamping structure is disposed on the power connector (9), and a clamping groove (23) for cooperating with the clamping structure is disposed on each of two sides of the inner wall of the upper portion of the coring drill barrel (14).
5. The coring device for the geothermal geological exploration, as recited in claim 4, characterized in that the clamping structure comprises an adjusting screw (15) rotatably arranged at the center of the power connector (9), a sleeve (17) screwed on the adjusting screw (15), and an upper stabilizing member (22) fixed at the lower end of the power connector (9), wherein a sleeve block (19) is fixed at the lower part of the upper stabilizing member (22), clamping blocks (20) are slidably arranged at two sides of the sleeve block (19), and the clamping blocks (20) and the sleeve (17) are connected through a connecting rod (18);
the lower part of set piece (19) is fixed with lower stabilizer (21) of coring drill section of thick bamboo (14) upper portion inner wall laminating, go up stabilizer (22) edge also with the inner wall laminating on coring drill section of thick bamboo (14) upper portion, connecting rod (18) one end with fixture block (20) are articulated, the other end with sleeve (17) are articulated go up stabilizer (22) and go up and offer the confession the logical groove that connecting rod (18) passed.
6. The coring device for geothermal geological exploration, as set forth in claim 5, characterized in that said threaded transmission structure comprises two lead screws (13) vertically fixed on said base plate (6) and a solenoid (12) threadedly connected to said lead screws (13), the connecting line of the central points of said two lead screws (13) being spatially perpendicular to the connecting line of the central points of said two guide pillars (7);
the screw pipe (12) is rotatably arranged on the frame body (8) and is connected with the power connector (9) through a meshing structure, and the thread turning directions of the two lead screws (13) are the same.
7. Coring device for geothermal geological exploration, according to claim 6, characterized by the fact that said toothing comprises a gearwheel (10) fixed on the external wall of said power connector (9) and a pinion (11) fixed on the external wall of said solenoid (12) and meshing with said gearwheel (10);
the top of adjusting screw (15) passes the top of power connector (9) and normal running fit with it the top of adjusting screw (15) is fixed with and is used for manual drive adjusting screw (15) pivoted knob (16), base plate (6) with unable adjustment base (1) center all is provided with the confession core drill section of thick bamboo (14) the through-hole that passes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517451.9A CN114215481A (en) | 2021-12-13 | 2021-12-13 | Subassembly and geothermol power geological exploration coring device that adjustable is stabilized to subbase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517451.9A CN114215481A (en) | 2021-12-13 | 2021-12-13 | Subassembly and geothermol power geological exploration coring device that adjustable is stabilized to subbase |
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| Publication Number | Publication Date |
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| CN114215481A true CN114215481A (en) | 2022-03-22 |
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|---|---|---|---|
| CN202111517451.9A Pending CN114215481A (en) | 2021-12-13 | 2021-12-13 | Subassembly and geothermol power geological exploration coring device that adjustable is stabilized to subbase |
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| CN (1) | CN114215481A (en) |
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| CN211692372U (en) * | 2019-12-19 | 2020-10-16 | 吉林建筑科技学院 | Novel geological engineering drilling machine |
| CN213627500U (en) * | 2020-08-21 | 2021-07-06 | 王春元 | Geological drilling coring device |
| CN213709080U (en) * | 2020-08-28 | 2021-07-16 | 赤峰鹏安市政工程有限公司 | Road construction quality detection device |
| CN213688999U (en) * | 2020-12-15 | 2021-07-13 | 周文辉 | Road detection equipment based on Internet of things |
| CN112850586A (en) * | 2021-01-06 | 2021-05-28 | 重庆泓鼎盈科技有限公司 | Bidirectional horizontal pushing type safety lifting platform |
| CN214748994U (en) * | 2021-04-12 | 2021-11-16 | 中化学交通建设集团第四工程有限公司 | Road surface bituminous mixture detects uses coring device |
| CN113389511A (en) * | 2021-06-04 | 2021-09-14 | 广东工业大学 | Rope coring drilling tool and coring method thereof |
| CN214808432U (en) * | 2021-06-11 | 2021-11-23 | 上海泰岚信息科技有限公司 | Wooden manipulator capable of being freely disassembled and assembled |
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